Siemens SINAMICS S Manuel page 1121

n_before_setpoint filter
Speed setpoint
from the function generator
1 = DSC active
[3090.8]
n_set from DSC
[3090.8]
1
n_ctrl n_set sum
r1170
0
[3080.8]
<1> Low-pass 2nd order. Detailed representation at [1024].
<2> General 2nd Order filter. Detailed representation at [1024].
<3> Speed pre-control only available for speed control with encoder. Pre-control
signal permanently connected to "0" for close-loop control without encoder
and for V/f control.
<4> p1400.10 = 1 is recommended, if in addition to the speed pre-control signal, a
torque pre-control signal is also connected at [5060].
<5> The interpolator is only effective for clock-cycle synchronous PROFIBUS
operation and sign-of-life received from the master (STW2.12 ... STW2.15). In
addition, when the Dynamic Servo Control (DSC) is active, an additional deadtime
of one speed controller clock cycle is effective.
<6> For a 1/0 edge from control command STW2.8 "traverse to fixed endstop" [2444]
the output of all filters is set to the input value for an instantaneous response to a
change of the speed setpoint sign.
Speed pre-control signal
[5490.7]
1 = Interpolation
Speed controller pre-control active
From speed control configuration
p1400.7
n_pre-control
1
p1430[C]
<3>
[3090.8] (0)
0
1 2
DO: SERVO
Servo speed control with encoder - speed setpoint filter and speed pre-control
n_set smooth
100 ms
r0020
n_set before filter
r0060 [2701.1] [2704.1]
Setpoint filter 1
+
+
p1416[D]
y
x
PT1 low pass
fn_n
p1417[D]
D_n
p1418[D]
|y|
x
fn
PT2 lowpass
fn_z
p1419[D] p1420[D]
y
x
2nd Order filter
fn_n
p1417[D] p1418[D]
x,y x
y
x y
t
Interpolator
<5>
3 4
p1414.0[D]
<6>
0
+
p1422[D]
1
+
y
x
t
p1423[D]
p1415[D]
0
|y|
D
y
1
x
2
f
<1>
D_z
p1425[D]
y
y
[5490.7]
x
1 = Speed pre-control
f
for symmetrizing
<2>
From the speed control
configuration
p1400.10
D_n
p1423[D]
0
1
<4>
Monitoring F07421 "Speed setpoint filter natural frequency > Shannon frequency"
5 6
fp_5020_01_eng.vsd
07.02.06 V02.04.00
p0115[1] (125.00 µs)
p1414.1[D]
Setpoint filter 2
<6>
0
+
1
y
y
t
PT1 low pass
fn_n
n_after_setpoint filter
D_n
from the function generator
p1424[D]
p1421[D]
0
D
y
1
2
fn
f
PT2 lowpass <1>
fn_z D_z
p1426[D]
y
f
2nd Order filter <2>
fn_n D_n
p1424[D]
n_pre-ctrl_2
7
Fuction diagram
SINAMICS S
n_set after filter
r0062
+
To the
speed controller
[5210.1]
and to the
reference model
[5030.1]
[5030.1]
8
- 5020 -